MPQ7225B-AEC1

MPQ7225B-AEC1

16-Channel, Current Sink LED Driver with Adaptive Feedback Control (AFC^TM) and UART Interface, AEC-Q100 Qualified

Description

The MPQ7225B-AEC1 is a 16-channel current-sink LED driver. Each channel is rated for up to 200mA of current, and 16 ICs can be cascaded together to create a 256-channel solution.

The device is optimized for animated or dynamic lighting applications. It employs 12-bit pulse-width modulation (PWM) dimming and 6-bit analog dimming register per channel, with individual control of each channel. The MPQ7225B-AEC1 features a universal asynchronous receiver-transmitter (UART) communication protocol, allowing for robust communication from a host MCU.
It features Adaptive Feedback Control (AFC^TM) to maximize system efficiency. The output voltage of the pre-regulator (i.e. buck voltage regulator) is adjusted in real time so that the voltage across the channels is kept at a minimum value (typically 300mV headroom at 200mA). Frequency spread spectrum (FSS) optimizes EMC performance. The LED current’s ramping rate and the phase shift between channels can be digitally configured as well.

The MPQ7225B-AEC1 can aid a system design for functional safety with a failsafe (/FS) indicator. The full protection suite includes LED open/short protection, ISET pin open/short protection, and thermal shutdown. If a fault occurs, the fault indicator pulls low and the matching fault register is set.

The MPQ7225B-AEC1 is available in a QFN-32 (5mmx6mm) package, and is AEC-Q100 qualified.

Features & Benefits

Scalability:
- 16 Channels, 200mA/Channel (Max Current)
- Cascade Up to 16 ICs for Up to 256 Channels
- Pin-Configurable Device Address
Designed for Automotive Applications:
- Supports 2.5V Cold Crank
- -40°C to +150°C Operating Junction Temperature (T_J) Range
Cooler Thermals and Optimized Efficiency:
- Adaptive Feedback Control (AFC^TM) Dynamically Optimizes Pre-Regulator Output
- 300mV Current Sink Headroom at 200mA
- Headroom Optimization for Multiple ICs
Robust Communication:
- 2Mbps UART-Compatible Interface
- 12-Bit Pulse-Width Modulation (PWM) Dimming or 6-Bit Analog Dimming for Each Channel

Optimized for EMI/EMC Reduction:

Configurable Phase Shift and Slew Rate
Frequency Spread Spectrum (FSS) (Internal Clock)
Selectable PWM Dimming Frequency
CISPR 25 Class 5 Compliant

Additional Features:

Functional Safety Document Available to Support System in Achieving ASIL Requirements
Failsafe (/FS) Pin and Fault Registers for System Protection and Diagnostics

LED Short (to GND and Battery)

LED Open

Thermal Warning and Shutdown

ISET Pin Open/Short

One-Time Programmable (OTP) Memory

Available in a QFN-32 (5mmx6mm) Package with Wettable Flanks

Available in AEC-Q100 Grade 1